Yun Ye was very satisfied with Law's allegiance.
In some respects, the Op-Op Fruit was still quite useful. It could swap people's minds, and the mind was the soul itself!
Moreover, after a mind swap, the ability user's body could still use its abilities...
For example, in the original story, after Smoker and Tashigi swapped minds, Tashigi, who possessed Smoker's body, could still use the Smoke-Smoke Fruit abilities of Smoker's body...
This was not actually difficult to explain. Devil Fruits fused with the soul and then altered the body through it. In essence, the body had already been transformed.
Even if the minds were swapped, the body would still retain its Devil Fruit abilities!
However, the restrictions were also extremely severe. One's strength would decline drastically, and one might even feel somewhat uncomfortable.
Because the mind and body did not match, the soul and body would clash. Given enough time, perhaps unexpected changes would occur...
Would the ability disappear? Or would the soul gradually gain control over the Devil Fruit ability of the body?
Yun Ye was actually very curious about this...
However, Yun Ye was more inclined toward the former. The soul was the foundation; it subtly changed the body through time. No matter how the minds were swapped, after enough time, the original soul would affect the new body again and reclaim its original Devil Fruit ability!
And this exchange was not without a price. It could even damage the soul. It was impossible to use this ability to seize another body and be reborn, achieving an effect similar to the Immortal Surgery!
Otherwise, this ability would be far too overpowered...
With Law's ability, perhaps he could uncover the peculiarity of Blackbeard's soul...
Law froze for a moment before nodding. "I understand, sir. But I want to meet